Browser.switchTo()

Browser.takeScreenshot([, options])

Takes a screenshot of the whole page and saves it to the flood/results folder with a random sequential name. You can download the archive of your test results at the end of the test to retrieve these screenshots.

Browser.visit(url[, options])

Instructs the browser to navigate to a specific page. This is typically used as the
entrypoint to your test, as the first instruction it is also responsible for creating
a new Browser tab for this page to load into.